From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sat, 22 Jan 2011 11:37:54 +0000 (+0000)
Subject: ARM: integrator: add Integrator/CP sched_clock support
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d77e270c53a4911d23ded9f4ab8b175a3fe3bb34;p=mv-sheeva.git

ARM: integrator: add Integrator/CP sched_clock support

Integrator/CP has the 24MHz counter which Versatile and later platforms
also have, which we use for sched_clock support.  Allow this counter to
be used when building a kernel targetting Integrator/CP alone.
Integrator/AP does not have this counter, so we must exclude support
for the Integrator family when this is enabled.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 05da36f754d..9e3ce26023e 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -44,6 +44,7 @@
 
 #include <plat/clcd.h>
 #include <plat/fpga-irq.h>
+#include <plat/sched_clock.h>
 
 #include "common.h"
 
@@ -440,11 +441,17 @@ static struct amba_device *amba_devs[] __initdata = {
 	&clcd_device,
 };
 
+#define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
+
 static void __init intcp_init_early(void)
 {
 	clkdev_add_table(cp_lookups, ARRAY_SIZE(cp_lookups));
 
 	integrator_init_early();
+
+#ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
+	versatile_sched_clock_init(REFCOUNTER, 24000000);
+#endif
 }
 
 static void __init intcp_init(void)
diff --git a/arch/arm/plat-versatile/Kconfig b/arch/arm/plat-versatile/Kconfig
index 0b275008d3e..52353beb369 100644
--- a/arch/arm/plat-versatile/Kconfig
+++ b/arch/arm/plat-versatile/Kconfig
@@ -11,7 +11,7 @@ config PLAT_VERSATILE_LEDS
 	depends on ARCH_REALVIEW || ARCH_VERSATILE
 
 config PLAT_VERSATILE_SCHED_CLOCK
-	def_bool y if !ARCH_INTEGRATOR
+	def_bool y if !ARCH_INTEGRATOR_AP
 	select HAVE_SCHED_CLOCK
 
 endif